I performed a "make World" compile of all front end models. The following failed compilation:
All the failures are due to filtermodule-with-control parts with disconnected inputs (unused inputs must be grounded for RCG2.9). The compiler fails at the first error, more parts may need grounding.
ISI-HAM
part not grounded: HAMn_L4CINF_V1
file: isi/common/models/isihammaster.mdl
| lho | r8122 not modified | 
| repo | r8876 14oct2014 Stuart | 
| llo | modified r8876 03nov2014 | 
ISI-BSC
part not grounded: OPTICNAME_ST1_L4CINF_H1
file: isi/common/models/isi2stagemaster.mdl
| lho | r8417 not modifed | 
| repo | r8875 14oct2014 Stuart | 
| llo | modified r8875 03nov2014 | 
LSC
part not grounded: PSL_POWER_SCALE
file: lsc/common/models/lscpsl.mdl
| lho | r8741 not modifed | 
| repo | r9038 03nov2014 Joe B | 
| llo | modified r9038 03nov2014 | 
SUS
part not gounded: <RC>_M3_LOCK_L
file: sus/common/models/RC_MASTER.mdl
This file is unique to LHO, L1 still uses the MC_MASTER.mdl